Quantum correlations at negative absolute temperatures

Gregory B. Furman; Shaul D. Goren; Victor M. Meerovich; Vladimir L. Sokolovsky

doi:10.1007/s11128-014-0826-7

Quantum correlations at negative absolute temperatures

Gregory B. Furman, Shaul D. Goren, Victor M. Meerovich, Vladimir L. Sokolovsky

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We study behavior of quantum discord, a kind of quantum correlation, in systems of dipole–dipole interacting spins in an external magnetic field in the whole temperature range (-∞ < T < ∞). It was shown that negative temperatures, which are introduced to describe inversions in the population in a finite level system, provide more favorable conditions for emergence of quantum correlations including entanglement. We show that at negative temperature, the correlations become more intense and discord exists between remote spins being in separated states.

Original language	English
Pages (from-to)	2759-2768
Number of pages	10
Journal	Quantum Information Processing
Volume	13
Issue number	12
DOIs	https://doi.org/10.1007/s11128-014-0826-7
State	Published - 15 Nov 2014

Keywords

Discord
Entanglement
Negative absolute temperature

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Statistical and Nonlinear Physics
Theoretical Computer Science
Signal Processing
Modeling and Simulation
Electrical and Electronic Engineering

Access to Document

10.1007/s11128-014-0826-7

Cite this

@article{15aa6020241c4de0a5a868cc7c0ef5bb,

title = "Quantum correlations at negative absolute temperatures",

abstract = "We study behavior of quantum discord, a kind of quantum correlation, in systems of dipole–dipole interacting spins in an external magnetic field in the whole temperature range (-∞ < T < ∞). It was shown that negative temperatures, which are introduced to describe inversions in the population in a finite level system, provide more favorable conditions for emergence of quantum correlations including entanglement. We show that at negative temperature, the correlations become more intense and discord exists between remote spins being in separated states.",

keywords = "Discord, Entanglement, Negative absolute temperature",

author = "Furman, {Gregory B.} and Goren, {Shaul D.} and Meerovich, {Victor M.} and Sokolovsky, {Vladimir L.}",

note = "Publisher Copyright: {\textcopyright} 2014, Springer Science+Business Media New York.",

year = "2014",

month = nov,

day = "15",

doi = "10.1007/s11128-014-0826-7",

language = "English",

volume = "13",

pages = "2759--2768",

journal = "Quantum Information Processing",

issn = "1570-0755",

publisher = "Springer New York",

number = "12",

}

TY - JOUR

T1 - Quantum correlations at negative absolute temperatures

AU - Furman, Gregory B.

AU - Goren, Shaul D.

AU - Meerovich, Victor M.

AU - Sokolovsky, Vladimir L.

PY - 2014/11/15

Y1 - 2014/11/15

N2 - We study behavior of quantum discord, a kind of quantum correlation, in systems of dipole–dipole interacting spins in an external magnetic field in the whole temperature range (-∞ < T < ∞). It was shown that negative temperatures, which are introduced to describe inversions in the population in a finite level system, provide more favorable conditions for emergence of quantum correlations including entanglement. We show that at negative temperature, the correlations become more intense and discord exists between remote spins being in separated states.

AB - We study behavior of quantum discord, a kind of quantum correlation, in systems of dipole–dipole interacting spins in an external magnetic field in the whole temperature range (-∞ < T < ∞). It was shown that negative temperatures, which are introduced to describe inversions in the population in a finite level system, provide more favorable conditions for emergence of quantum correlations including entanglement. We show that at negative temperature, the correlations become more intense and discord exists between remote spins being in separated states.

KW - Discord

KW - Entanglement

KW - Negative absolute temperature

UR - http://www.scopus.com/inward/record.url?scp=84911397785&partnerID=8YFLogxK

U2 - 10.1007/s11128-014-0826-7

DO - 10.1007/s11128-014-0826-7

M3 - Article

AN - SCOPUS:84911397785

SN - 1570-0755

VL - 13

SP - 2759

EP - 2768

JO - Quantum Information Processing

JF - Quantum Information Processing

IS - 12

ER -

Quantum correlations at negative absolute temperatures

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this